Why Is My Growth Path Becoming a Succubus?

I was supposed to be an ordinary high school student, until one day I was suddenly told that I was actually descended from a succubus clan.

Not only do I have to reenroll as my own younger cousin, but to survive, I also have to find someone to milk?

I'm a person with principles! Even if I starve, I won't do something like that!

The next day...

"Big brother, I'm still hungry..."